1 ; RUN: opt < %s -instcombine -S | FileCheck %s
4 "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
6 define i32 @test1(i32 %X) {
8 icmp slt i32 %X, 0 ; <i1>:0 [#uses=1]
9 zext i1 %0 to i32 ; <i32>:1 [#uses=1]
12 ; CHECK: lshr i32 %X, 31
16 define i32 @test2(i32 %X) {
18 icmp ult i32 %X, -2147483648 ; <i1>:0 [#uses=1]
19 zext i1 %0 to i32 ; <i32>:1 [#uses=1]
22 ; CHECK: lshr i32 %X, 31
27 define i32 @test3(i32 %X) {
29 icmp slt i32 %X, 0 ; <i1>:0 [#uses=1]
30 sext i1 %0 to i32 ; <i32>:1 [#uses=1]
33 ; CHECK: ashr i32 %X, 31
37 define i32 @test4(i32 %X) {
39 icmp ult i32 %X, -2147483648 ; <i1>:0 [#uses=1]
40 sext i1 %0 to i32 ; <i32>:1 [#uses=1]
43 ; CHECK: ashr i32 %X, 31
49 define <2 x i1> @test5(<2 x i64> %x) {
51 %V = icmp eq <2 x i64> %x, undef
54 ; CHECK: ret <2 x i1> <i1 true, i1 true>
57 define i32 @test6(i32 %a, i32 %b) {
58 %c = icmp sle i32 %a, -1
59 %d = zext i1 %c to i32
64 ; CHECK-NEXT: ashr i32 %a, 31
65 ; CHECK-NEXT: %f = and i32 %e, %b
66 ; CHECK-NEXT: ret i32 %f
70 define i1 @test7(i32 %x) {
73 %b = icmp ult i32 %a, %x
76 ; CHECK: %b = icmp ne i32 %x, 0
80 define i1 @test8(i32 %x){
83 %b = icmp eq i32 %a, %x
89 define i1 @test9(i32 %x) {
92 %b = icmp ugt i32 %x, %a
95 ; CHECK: icmp ugt i32 %x, 1
99 define i1 @test10(i32 %x){
102 %b = icmp slt i32 %a, %x
106 ; CHECK: %b = icmp ne i32 %x, -2147483648
110 define i1 @test11(i32 %x) {
111 %a = add nsw i32 %x, 8
112 %b = icmp slt i32 %x, %a
119 define i1 @test12(i1 %A) {
120 %S = select i1 %A, i64 -4294967295, i64 8589934591
121 %B = icmp ne i64 bitcast (<2 x i32> <i32 1, i32 -1> to i64), %S
124 ; CHECK-NEXT: %B = select i1
125 ; CHECK-NEXT: ret i1 %B
129 define i1 @test13(i8 %X) nounwind readnone {
131 %cmp = icmp slt i8 undef, %X
134 ; CHECK: ret i1 false
137 define i1 @test14(i8 %X) nounwind readnone {
139 %cmp = icmp slt i8 undef, -128
142 ; CHECK: ret i1 false
145 define i1 @test15() nounwind readnone {
147 %cmp = icmp eq i8 undef, -128
150 ; CHECK: ret i1 undef
153 define i1 @test16() nounwind readnone {
155 %cmp = icmp ne i8 undef, -128
158 ; CHECK: ret i1 undef
161 define i1 @test17(i32 %x) nounwind {
163 %and = and i32 %shl, 8
164 %cmp = icmp eq i32 %and, 0
167 ; CHECK-NEXT: %cmp = icmp ne i32 %x, 3
171 define i1 @test18(i32 %x) nounwind {
173 %and = and i32 %sh, 1
174 %cmp = icmp eq i32 %and, 0
177 ; CHECK-NEXT: %cmp = icmp ne i32 %x, 3
180 define i1 @test19(i32 %x) nounwind {
182 %and = and i32 %shl, 8
183 %cmp = icmp eq i32 %and, 8
186 ; CHECK-NEXT: %cmp = icmp eq i32 %x, 3
189 define i1 @test20(i32 %x) nounwind {
191 %and = and i32 %shl, 8
192 %cmp = icmp ne i32 %and, 0
195 ; CHECK-NEXT: %cmp = icmp eq i32 %x, 3
198 define i1 @test21(i8 %x, i8 %y) {
203 %B = icmp ugt i8 %A, 3
207 define i1 @test22(i8 %x, i8 %y) {
212 %B = icmp ult i8 %A, 4
218 ; CHECK: icmp sgt i32 %x, 1328634634
219 define i1 @test23(i32 %x) nounwind {
220 %i3 = sdiv i32 %x, -1328634635
221 %i4 = icmp eq i32 %i3, -1
225 @X = global [1000 x i32] zeroinitializer
229 ; CHECK: %cmp = icmp eq i64 %i, 1000
231 define i1 @test24(i64 %i) {
232 %p1 = getelementptr inbounds i32* getelementptr inbounds ([1000 x i32]* @X, i64 0, i64 0), i64 %i
233 %cmp = icmp eq i32* %p1, getelementptr inbounds ([1000 x i32]* @X, i64 1, i64 0)